Increase memory size for slaves

New components (like heat) are actively using swap,
we should increase mem.size for improvement of deployment.

Change-Id: Ia5a3ddafc62ae3e6c0464be73fe9c30dce035de1
Add timeout for ceph recovery

When user destroy osd-node from cluster,
ceph requires ~5 min for recovering.

Improvement for ceph_ha test.

Change-Id: I6e12223ca6602d82182323c8b264c787c43e0f04
Merge "Add timeout for ceph recovery"
Switch to stable/4.0 branches

Change-Id: Ic3f81bbb5fe49f419a971fbb0c4912c452e6bc19
Ceph build tweaks. Do not merge.

Change-Id: If7f369078f5e1b559a2ec2aa9429f3759e037ba4